Pressure-regulator and connection.



No. 632,808. Patented Sept. l2, I899. H. M. DUNLAP.

PRESSURE REGULATOR AND CONNECTION.

(Application filed Sept. 26, 1898.)

No Model.)

Witnesses: (471;; a (g m/ UNITED STATES PAT NT OFFICE.

HARLEY M. DUNLAP, OF BATTLE CREEK, MICHIGAN.

PRESSURE-REGULATOR AND CONNECTION.

SPECIFICATION forming part of Letters Patent No. 632,808, datedSeptember 12, 1899.

Application filed September 26,1398. Serial No. 691,934. No model.)

To rtZZ whom it may concern:

Be it known that I, HARLEY M. DUNLAP, a citizen of the United States,residing at the city of Battle Creek, in the county of Calhoun and Stateof Michigan, have invented certain new and useful Improvements inPressure- Regulators and Connections, of which the following is aspecification.

This invention relates to improvements in pressure regulators orreducers and to suitable connections enabling the proper determinationof relative and absolute pressurein the various parts connected.

The objects of this invention are, first, to provide for use, inconnection with compressed-air tanks or for use in connection withsteam-boilers for that matter, of an improved pressure-regulatin gdevice which shall be simple in construction and eflicient in operation;second, to provide, in connection with the pressure-regulator, suitablevalves and connections whereby the operator can easily determine from asingle pressure-gage the pressure in the supply-tank and also reducedpressure which is to be delivered by very simple manipulation.

Further objects will definitely appear in the detailed description tofollow.

I accomplish these objects of my invention by the devices and meansdescribed in this specification.

The invention is definitely pointed out in the claims.

The structure is fully illustrated in the accompanying drawings, forminga part of this specification, in which Figure 1 is front elevation ofthe same, showing a tank in conventional form. Fig. 2 is a verticaldetail transverse sectional view taken on line 2 2 of Fig. 1, looking inthe direction of the little arrows at the end of the sectional line.

Similar letters of reference refer to similar parts throughout theseveral views.

In the drawings, Q represents the pressuretank, to which my improvedregulator and mechanism are connected.

A is the main body of the regulator, which contains a hollow chamber Hin its upper portion and through which a passage E leads up from tank Qbelow, which passage is provided with a stopcock C. The passagecontinues beyond the stop-cock within the casing A at G. A tube I, theupper end of which is reversed, is inserted into the bottom of thehollow portion II and connects to the passage G. The passage G continueslaterally through the casing A at G and is connected by a pipe F withsuitable couplings to a vertical pipe P. The pipe F is closed by asuitable valve or stop-cock D, actuated by a hand-wheel. The pipe P isconnected at its upper end to a suitable pressure-gage R. A cross-pipeO, with suitable connections, connects the pipe P at a point between thepressure-gage R and the valve D with the chamber H.

Over the upper part of the chamber H is a diaphragm K, secured inposition by a suitable cap M. On the under side of the diaphragm is asuitable stirrup J, having a packing J at the bottom adapted to beraised against the reversed end of the pipe I to close the same. A stemL is secured opposite the stirrup J and projects out through asuitabletubular thumb-nut M, which is threaded on its outside and engagesscrewthreads within the cap M. A spring N is on the stem L and restsagainst the thumb-nut M above and against the shoulder or nut on thestem L just above the diaphragm K. Thus it will be seen that the tensionon the spring N can be varied by the adjustable nut M.

Connected to each side of the main casing A and delivering from thechamber H are pipes B with suitable globe -valves 13, adapted to coupleto any tube or part B. I provide a pair of these, so that the connectioncan be easily made from either side, though the single coupling would beall that is really required in any single instance.

Having thus specifically and minutely described the various parts of myimproved pressure-regulating apparatus and connection, I will now statetheir operation.

Air under pressure in the tank Q will pass through the passage E, upthrough the passage G, through the tube I, into the chamber II. When thepressure in the chamber H becomes sufiicient, the diaphragm K will beraised and the tube I closed by the stirrup J raising the packing Jagainst the opening of the tube. Air will also pass through the pipes Oand P to the pressure-gage R, and the pressure within the chamber H canthus be easily read. If the pressure is more than is desired, the amountcan be regulated by screwing the thumb-nut M up, which will relieve thepressure on the spring and permit the valve to be closed that muchquicker, or if the pressure is insufficient the thumb-nut M can bescrewed down to secure a greater resistance to the dia phragm, whichwill increase the pressure within the chamber. It will of course benecessary in determining the pressure after each adjustment to open thedelivery-pipe 13 to allow a little air to escape, so that the pressurewill become normal for the particular adjustment.

If at any time that it is desired for any reason to know the exactpressure within the tank, the valve D can be opened and the directpressure of the tank will be read on the pressure-gage R. WVhen thevalve D is closed, the pressure-regulator then performs its work.Otherwise the full pressure is delivered. The gage always shows fullpressure delivered.

When the apparatus is not in use, the valve 0 can be closed and allleakage practically prevented and unnecessary pressure on all parts ofthe apparatus be relieved.

Having thus fully and specifically described my improvedpressure-regulator and connections, I desire to state that theparticular connection for the pressure-gage could be employed withalmost any style of pressureregulator without departing from myinvention in that particular, and of course the exact couplings couldalso be varied or tubes and pipes used without couplings and any kind ofstop cock or valve be employed.

This exact construction of regulator I believe to possess merit over anyother, and I therefore desire to claim the same specifically Having thusdescribed my invention, what I claim as new, and desire to secure byLetters Patent, is-

1. I11 a pressure-regulator and connection the combination of the maincasing A, having passage E, provided with stop-cock O, passage G, and G,leading through the same and having a chamber H, therein, a tube I,curved backward] y on itself Within the chamber H, a diaphragm K, with asuitable stirrup bearing a packing adapted to raise and close the tubeI, a cap M, for retaining the diaphragm in place; a stem L, secured tothe diaphragm; a spring surrounding the stem to exert pressure on thesame; an adjustable thumb-nut for adjusting the tension on the spring, aconnecting-tube F, delivering to tube 1, a pressure-gage connecting withtube P; a second tube 0, connecting the chamber H, to the pipe P, and astop cock or valve D, to close the tube F, all coacting for the purposespecified.

2. The combination in a pressure-regulator and connection of asuitablemain casing containing means for regulating the pressure, a pipeconnecting said main casing below the pressure-regulator with apressure-gage a valve for closing the same and a pipe connecting thefirst-named pipe and the pressuregage directly with the casin g beyondthe pressure-regulator so that by opening an additional valve thetank-pressure could be read on the samegage indicating reduced pressureas specified.

In witness whereof I have hereunto set my hand and seal in the presenceof two witnesses.

HARLEY M. DUNLAR, [L. 8.]

